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This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Cytogenetics knowledge and support exam preparation. Choose a topic below to get started.
1. |
Which of these proteins help to backtrack the RNA? |
A. | XPC |
B. | Dna G |
C. | TFIIH |
D. | CSA |
Answer» E. | |
2. |
RNA has a proofreading mechanism. |
A. | True |
B. | False |
Answer» B. False | |
3. |
You can see non-cannonical base pairing in________ |
A. | dsDNA |
B. | ssDNA |
C. | dsRNA |
D. | ssRNA |
Answer» D. ssRNA | |
4. |
When Rho catches up with RNA polymerase it _______ |
A. | Stalls |
B. | Falls off |
C. | Backtracks |
D. | Moves on |
Answer» C. Backtracks | |
5. |
Rho dependent termination mechanism doesn’t reguire____________ |
A. | ATP |
B. | Stem loop structure |
C. | G-C rich stem |
D. | Sigma factor |
Answer» E. | |
6. |
Rho shows base preference although it doesn’t have any concensus cis binding sequence. Which region will be expected to bind Rho better? |
A. | G and C rich region |
B. | A and T rich region |
C. | Region rich in C and poor in G |
D. | Region rich in A and poor in T |
Answer» D. Region rich in A and poor in T | |
7. |
YOU_CAN_SEE_NON-CANNONICAL_BASE_PAIRING_IN________?$ |
A. | dsDNA |
B. | ssDNA |
C. | dsRNA |
D. | ssRNA |
Answer» D. ssRNA | |
8. |
WHEN_RHO_CATCHES_UP_WITH_RNA_POLYMERASE_IT________?$ |
A. | Stalls |
B. | Falls off |
C. | Backtracks |
D. | Moves on |
Answer» C. Backtracks | |
9. |
Which of these proteins help to backtrack the RNA?$ |
A. | XPC |
B. | Dna G |
C. | TFIIH |
D. | CSA |
Answer» E. | |
10. |
RNA has a proofreading mechanism.$ |
A. | True |
B. | False |
Answer» B. False | |
11. |
Rho dependent termination mechanism doesn’t reguire___________?# |
A. | ATP |
B. | Stem loop structure |
C. | G-C rich stem |
D. | Sigma factor |
Answer» E. | |
12. |
Rho shows base preference although it doesn’t have any concensus cis binding sequence. Which region will be expected to bind Rho better?$ |
A. | G and C rich region |
B. | A and T rich region |
C. | Region rich in C and poor in G |
D. | Region rich in A and poor in T |
Answer» D. Region rich in A and poor in T | |
13. |
Rho protein, that is necessary for transcription termination, is a ________ |
A. | Homotetramer |
B. | Heterotetramer |
C. | Heterohexamer |
D. | Homohexamer |
Answer» E. | |
14. |
You modify your gene DNA sequence by introducing an attenuator within the transcribed region. You isolate the labeled gene product and perform SDS PAGE. You observe two bands one higher and another slightly lower. Which of this band corresponds to properly modified sequence? |
A. | Higher |
B. | Lower |
C. | Both the bands as they show differently folded protein |
D. | This is an experimental artifact |
Answer» C. Both the bands as they show differently folded protein | |
15. |
Which of these interactions is the weakest? |
A. | rC-dG |
B. | rG-dC |
C. | rA-dT |
D. | rU-dA |
Answer» E. | |
16. |
To study the functioning of intrinsic terminator you increase the number of G-C base pairs in the stem and decrease the U bases from the tail region. What would be its effect on termination? |
A. | No visible effect |
B. | Efficiency will decrease |
C. | Efficiency will increase |
D. | The RNA polymerase will stall at the terminator |
Answer» B. Efficiency will decrease | |
17. |
A ssRNA shows inverted tandem repeat. What would be its secondary structure? |
A. | Linear |
B. | Hair pin |
C. | Stem-loop structure |
D. | Crucifix |
Answer» D. Crucifix | |
18. |
What form of helix would you expect to see in double stranded RNA? |
A. | A form |
B. | B form |
C. | C form |
D. | D form |
Answer» B. B form | |